Imath::M44d AlembicInput::transformAtTime( double time ) const
{
M44d result;
if( IXform::matches( m_data->object.getMetaData() ) )
{
size_t index0, index1;
double lerpFactor = sampleIntervalAtTime( time, index0, index1 );
IXform iXForm( m_data->object, kWrapExisting );
IXformSchema &iXFormSchema = iXForm.getSchema();
if( index0 == index1 )
{
XformSample sample;
iXFormSchema.get( sample, ISampleSelector( (index_t)index0 ) );
result = sample.getMatrix();
}
else
{
XformSample sample0;
iXFormSchema.get( sample0, ISampleSelector( (index_t)index0 ) );
XformSample sample1;
iXFormSchema.get( sample1, ISampleSelector( (index_t)index1 ) );
if( sample0.getNumOps() != sample1.getNumOps() ||
sample0.getNumOpChannels() != sample1.getNumOpChannels()
)
{
throw IECore::Exception( "Unable to interpolate samples of different sizes" );
}
XformSample interpolatedSample;
for( size_t opIndex = 0; opIndex < sample0.getNumOps(); opIndex++ )
{
XformOp op0 = sample0.getOp( opIndex );
XformOp op1 = sample1.getOp( opIndex );
XformOp interpolatedOp( op0.getType(), op0.getHint() );
for( size_t channelIndex = 0; channelIndex < op0.getNumChannels(); channelIndex++ )
{
interpolatedOp.setChannelValue(
channelIndex,
lerp( op0.getChannelValue( channelIndex ), op1.getChannelValue( channelIndex ), lerpFactor )
);
}
interpolatedSample.addOp( interpolatedOp );
}
result = interpolatedSample.getMatrix();
}
}
return result;
}
Imath::M44d AlembicInput::transformAtSample( size_t sampleIndex ) const
{
M44d result;
if( IXform::matches( m_data->object.getMetaData() ) )
{
IXform iXForm( m_data->object, kWrapExisting );
IXformSchema &iXFormSchema = iXForm.getSchema();
XformSample sample;
iXFormSchema.get( sample, ISampleSelector( (index_t)sampleIndex ) );
return sample.getMatrix();
}
return result;
}
//-*****************************************************************************
void accumXform( M44d &xf, IObject obj )
{
if ( ISimpleXform::matches( obj.getMetaData() ) )
{
ISimpleXform x( obj, kWrapExisting );
xf *= x.getSchema().getValue().getMatrix();
}
else if ( IXform::matches( obj.getMetaData() ) )
{
IXform x( obj, kWrapExisting );
XformSample xs;
x.getSchema().get( xs );
xf *= xs.getMatrix();
}
}
IECore::ObjectPtr FromAlembicXFormConverter::doAlembicConversion( const Alembic::Abc::IObject &iObject, const Alembic::Abc::ISampleSelector &sampleSelector, const IECore::CompoundObject *operands ) const
{
IXform iXForm( iObject, kWrapExisting );
IXformSchema &iXFormSchema = iXForm.getSchema();
XformSample sample;
iXFormSchema.get( sample, sampleSelector );
M44d m = sample.getMatrix();
return new M44fData(
M44f(
m[0][0], m[0][1], m[0][2], m[0][3],
m[1][0], m[1][1], m[1][2], m[1][3],
m[2][0], m[2][1], m[2][2], m[2][3],
m[3][0], m[3][1], m[3][2], m[3][3]
)
);
}
void accumXform( Imath::M44d &xf, IObject obj, chrono_t curTime, bool interpolate)
{
if ( IXform::matches( obj.getHeader() ) )
{
Imath::M44d mtx;
IXform x( obj, kWrapExisting );
XformSample xs;
x.getSchema().get( xs );
if (!x.getSchema().isConstant()) {
TimeSamplingPtr timeSampler = x.getSchema().getTimeSampling();
if (interpolate) {
//std::pair<index_t, chrono_t> lSamp;// = timeSampler->getFloorIndex(curTime, x.getSchema().getNumSamples());
Alembic::AbcCoreAbstract::index_t floorIdx, ceilIdx;
double amt = getWeightAndIndex(curTime, timeSampler,
x.getSchema().getNumSamples(), floorIdx, ceilIdx);
if (amt != 0 && floorIdx != ceilIdx) {
const ISampleSelector iss_start(floorIdx);//lSamp.first);
Imath::M44d mtx_start = x.getSchema().getValue(iss_start).getMatrix();
//std::pair<index_t, chrono_t> rSamp = timeSampler->getCeilIndex(curTime, x.getSchema().getNumSamples());
const ISampleSelector iss_end(ceilIdx);//rSamp.first);
Imath::M44d mtx_end = x.getSchema().getValue(iss_end).getMatrix();
Imath::V3d s_l,s_r,h_l,h_r,t_l,t_r;
Imath::Quatd quat_l,quat_r;
DecomposeXForm(mtx_start, s_l, h_l, quat_l, t_l);
DecomposeXForm(mtx_end, s_r, h_r, quat_r, t_r);
if ((quat_l ^ quat_r) < 0)
{
quat_r = -quat_r;
}
mtx = RecomposeXForm(Imath::lerp(s_l, s_r, amt),
Imath::lerp(h_l, h_r, amt),
Imath::slerp(quat_l, quat_r, amt),
Imath::lerp(t_l, t_r, amt));
}
else {
const ISampleSelector iss(curTime);
xs = x.getSchema().getValue(iss);
mtx = xs.getMatrix();
}
}
else { // no interpolation, get nearest sample
const ISampleSelector iss(curTime);
xs = x.getSchema().getValue(iss);
mtx = xs.getMatrix();
}
}
else {
mtx = xs.getMatrix();
}
xf *= mtx;
}
}
//-*****************************************************************************
void xformIn()
{
IArchive archive( Alembic::AbcCoreOgawa::ReadArchive(), "Xform1.abc" );
Abc::M44d identity;
XformSample xs;
IXform a( IObject( archive, kTop ), "a" );
std::cout << "'a' num samples: " << a.getSchema().getNumSamples() << std::endl;
TESTING_ASSERT( a.getSchema().getNumOps() == 1 );
TESTING_ASSERT( a.getSchema().getInheritsXforms() );
for ( index_t i = 0; i < 20; ++i )
{
XformSample xs;
a.getSchema().get( xs, Abc::ISampleSelector( i ) );
TESTING_ASSERT( xs.getNumOps() == 1 );
TESTING_ASSERT( xs[0].isTranslateOp() );
TESTING_ASSERT( xs[0].isYAnimated() == true );
TESTING_ASSERT( xs[0].isXAnimated() == false );
TESTING_ASSERT( xs[0].isZAnimated() == false );
TESTING_ASSERT( xs.getTranslation() == V3d( 12.0, i+42.0, 20.0 ) );
TESTING_ASSERT( xs.getMatrix() ==
Abc::M44d().setTranslation( V3d(12.0, i+42.0, 20.0)) );
}
IXform b( a, "b" );
b.getSchema().get( xs );
TESTING_ASSERT( b.getSchema().getTimeSampling()->getTimeSamplingType().isUniform() );
// the schema is not static, because set() was called 20 times on it.
TESTING_ASSERT( !b.getSchema().isConstant() );
TESTING_ASSERT( b.getSchema().getNumSamples() == 20 );
TESTING_ASSERT( xs.getNumOps() == 0 );
TESTING_ASSERT( b.getSchema().getNumOps() == 0 );
TESTING_ASSERT( xs.getMatrix() == identity );
for (size_t i = 0; i < 20; ++i)
{
AbcA::index_t j = i;
TESTING_ASSERT( b.getSchema().getInheritsXforms( ISampleSelector( j ) )
== (i&1) );
}
IXform c( b, "c" );
xs = c.getSchema().getValue();
TESTING_ASSERT( xs.getNumOps() == 0 );
TESTING_ASSERT( c.getSchema().getNumOps() == 0 );
TESTING_ASSERT( xs.getMatrix() == identity );
TESTING_ASSERT( c.getSchema().getInheritsXforms() );
TESTING_ASSERT( c.getSchema().isConstantIdentity() );
IXform d( c, "d" );
xs = d.getSchema().getValue();
TESTING_ASSERT( xs.getNumOps() == 1 );
TESTING_ASSERT( d.getSchema().getNumOps() == 1 );
TESTING_ASSERT( xs[0].isScaleOp() );
TESTING_ASSERT( ! ( xs[0].isXAnimated() || xs[0].isYAnimated()
|| xs[0].isZAnimated() ) );
TESTING_ASSERT( xs.getScale().equalWithAbsError( V3d( 3.0, 6.0, 9.0 ),
VAL_EPSILON ) );
TESTING_ASSERT( xs.getMatrix() ==
Abc::M44d().setScale( V3d(3.0, 6.0, 9.0)) );
TESTING_ASSERT( d.getSchema().getInheritsXforms() );
IXform e( d, "e" );
TESTING_ASSERT( e.getSchema().isConstantIdentity() );
TESTING_ASSERT( e.getSchema().isConstant() );
TESTING_ASSERT( e.getSchema().getNumOps() == 3 );
IXform f( e, "f" );
TESTING_ASSERT( f.getSchema().isConstant() ); // is constant
TESTING_ASSERT( ! f.getSchema().isConstantIdentity() ); // not identity
IXform g( f, "g" );
Abc::M44d gmatrix;
gmatrix.makeIdentity();
XformSample gsamp = g.getSchema().getValue();
TESTING_ASSERT( gsamp.getNumOps() == 20 );
TESTING_ASSERT( gsamp.getNumOpChannels() == 20 * 16 );
TESTING_ASSERT( g.getSchema().getNumSamples() == 1 );
TESTING_ASSERT( g.getSchema().isConstant() );
TESTING_ASSERT( !g.getSchema().isConstantIdentity() );
for ( size_t i = 0 ; i < 20 ; ++i )
{
TESTING_ASSERT( gsamp[i].getChannelValue( 1 ) == (double)i );
}
std::cout << "Tested all xforms in first test!" << std::endl;
}
